High-gloss and high-plumpness cathode acrylic acid epoxy electrophoretic coating and preparation method

A technology of acrylic epoxy and electrophoretic coatings, applied in the direction of electrophoretic coatings, epoxy resin coatings, coatings, etc., can solve the problems of low gloss, insufficient plumpness, and poor wettability of pigments in electrophoretic paint films, and achieve high plumpness, Good decoration and high gloss of the coating film

Inactive Publication Date: 2019-05-10
WUHAN KOLEAL NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, with the development of science and technology, people have gradually found that cathodic electrophoretic paint has the problems of low gloss and insufficient plumpness due to its poor wettability to pigments.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take the deionized water and the prepared color paste and emulsion and mix them at a mass ratio of 1:4:5, then ripen at 30°C for 50 hours, and then perform electrophoresis at a voltage of 90V for 4 minutes.

[0017] Wherein the emulsion comprises the following components by mass percentage: 8% of modified acrylic resin, 30% of amine-modified epoxy resin, 20% of monoisocyanate blocker, 40.7% of deionized water, 0.5% of emulsifier, and 0.8% of glacial acetic acid.

[0018] The color paste includes the following components in mass percentage: 15% of epoxy amine modified resin, 18% of carbon black, 18% of kaolin, 2% of emulsifier, and 47% of deionized water.

[0019] Among them, the modified acrylic resin contains 5% butyl acrylate, 10% methyl methacrylate, 10% styrene, 5% hydroxybutyl acrylate, 5% n-butyl methacrylate, methacrylic acid 2% tert-butylaminoethyl ester, 5% dimethylaminoethyl methacrylate, 0.2% azobisisobutyronitrile, 10% n-butanol, 10% propylene glycol methyl ...

Embodiment 2

[0028] Take the deionized water and the prepared color paste and emulsion and mix them at a mass ratio of 1:4:5, then ripen at 25°C for 48 hours, and then perform electrophoresis at a voltage of 90V for 3 minutes.

[0029] Wherein the emulsion includes the following components by mass percentage: 5% modified acrylic resin, 40% amine modified epoxy resin, 10% monoisocyanate blocker, 44% deionized water, 0.5% emulsifier, and 0.5% glacial acetic acid.

[0030] The color paste includes the following components in mass percentage: 40% of epoxy amine modified resin, 10% of carbon black, 18% of kaolin, 2% of emulsifier, and 30% of deionized water.

[0031] Among them, the modified acrylic resin contains 7% of butyl acrylate, 10% of methyl methacrylate, 8% of styrene, 7% of hydroxybutyl acrylate, 2% of n-butyl methacrylate, methacrylic acid tert-butylaminoethyl ester 5%, dimethylaminoethyl methacrylate 7%, azobisisobutyronitrile 0.5%, n-butanol 10%, propylene glycol methyl ether 10%, ...

Embodiment 3

[0040] Take the deionized water and the prepared color paste and emulsion and mix them at a mass ratio of 1:4:5, then ripen at 26°C for 48 hours, and then perform electrophoresis at a voltage of 90V for 4 minutes.

[0041] Wherein the emulsion comprises the following components by mass percentage: 8% of modified acrylic resin, 35% of amine-modified epoxy resin, 12% of monoisocyanate blocker, 44% of deionized water, 0.5% of emulsifier, and 0.5% of glacial acetic acid.

[0042] The color paste includes the following components in mass percentage: 40% of epoxy amine modified resin, 10% of carbon black, 10% of kaolin, 2% of emulsifier, and 38% of deionized water.

[0043] Among them, the modified acrylic resin contains 6% of butyl acrylate, 10% of methyl methacrylate, 5% of styrene, 5% of hydroxybutyl acrylate, 2% of n-butyl methacrylate, methacrylic acid tert-butylaminoethyl ester 5%, dimethylaminoethyl methacrylate 5%, azobisisobutyronitrile 0.5%, n-butanol 10%, propylene glycol...

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Abstract

The invention relates to an electrophoretic coating, in particular to a cathode acrylic acid epoxy electrophoretic coating which can form high gloss and high plumpness on the surfaces of metal substrates. The coating comprises, in weight percent, 35-40% of emulsion, 5-10% of color paste and deionized water. The emulsion comprises, in weight percent, 3-8% of modified acrylic resin, 20-50% of aminemodified epoxy resin, 4-20% of isocyanate sealants, 20-50% of deionized water, 0.2-0.5% of emulsifying agents and 0.3-0.8% of glacial acetic acid. The color paste comprises, in weight percent, 15-45%of epoxy amine modified resin, 30-50% of deionized water, 5-18% of carbon black, 5-18% of kaolin and 2-4% of emulsifying agents. The emulsion, the color paste and the deionized water are mixed according to the weight ratio of 1:4:5, curing mixture for 48-50 hours at the temperature of 25-30 DEG C, and electrophoresis is implemented for 3-4mintues under the voltage of 100-250V. The prepared electrophoretic coating is high in film gloss and plumpness and good in decorativeness.

Description

technical field [0001] The invention relates to an electrophoretic coating, in particular to a cathodic acrylic epoxy electrophoretic coating with high gloss and high fullness and a preparation method thereof. Background technique [0002] Electrophoretic coatings originated in the 1930s. From the mid-1960s, the synthesis of cationic resins began to be studied, and they were used as primers for household appliances requiring high corrosion resistance in the early 1970s. Later, anodic electrophoretic coatings were discovered. It will corrode the metal surface and make it lose its luster, which cannot meet the requirements of surface decoration. Subsequently, cathodic electrophoretic coatings with higher corrosion resistance and decorative effects were gradually developed. It is widely used in the motor vehicle industry, and is widely used in building materials, light industry, household appliances and other industrial fields, as well as surface anticorrosion and decoration o...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C09D163/00C09D133/12C09D125/14C09D5/44C09D7/61C09D17/00
Inventor李再亮申杰李金李子健李阳李再峰
OwnerWUHAN KOLEAL NEW MATERIAL CO LTD